- K35.33 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM K35.33 became effective on October 1, 2022.
- This is the American ICD-10-CM version of K35.33 – other international versions of ICD-10 K35.33 may differ.
ICD-10-CM K35.33 is grouped within Diagnostic Related Group(s):
- 338 Appendectomy with complicated principal diagnosis with mcc
- 339 Appendectomy with complicated principal diagnosis with cc
- 340 Appendectomy with complicated principal diagnosis without cc/mcc
- 371 Major gastrointestinal disorders and peritoneal infections with mcc
- 372 Major gastrointestinal disorders and peritoneal infections with cc
- 373 Major gastrointestinal disorders and peritoneal infections without cc/mcc
Applicable To
- (Acute) appendicitis with (peritoneal) abscess NOS
- Ruptured appendix with localized peritonitis and abscess
Code History
- 2019 (effective 10/1/2018): New code
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2024 (effective 10/1/2022): No change
Diagnosis Index entries containing back-references to K35.33:
- appendix > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- cecum > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- ileocecal > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- fossa > iliac (region) L02.214
- periappendicular > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- pericecal > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- with appendicitis > peritoneum, peritoneal (perforated) (ruptured) K65.1
- perityphlic > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- postcecal > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- subcecal > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- vermiform appendix > Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- peritoneal abscess > with K35.891
- peritonitis NEC > with K35.891
- and abscess > perforation K35.32
- peritoneal abscess > with K35.891
- peritonitis NEC > with K35.891
- and abscess > perforation K35.32
- with peritoneal abscess > cecum (with peritonitis) K65.0